Ruth Britto
Professor in Theoretical Physics
Fellow of Trinity College Dublin
Dublin 2
Ireland
+353 1 896 3945
Current Teaching
MAU34107
Combinatorics, Michaelmas 2024
MAU44406 The
Standard Model of Elementary Particle Physics, Hilary 2025
Research
Scattering amplitudes play a key role in
high-energy physics. Not only do they describe the actual scattering taking
place in collider experiments--of current importance in the era of the Large
Hadron Collider (LHC)--but they also illuminate the formal aspects of quantum
field theories, such as divergent behavior or integrability. Amplitudes are
thus useful both practically and formally, but their availability is limited by
the difficulty of computing them.
As the number of particles in the scattering process
increases, or the perturbative expansion is carried out to higher order, the
traditional technique of Feynman rules fails to be feasibly implementable. This
difficulty has prompted the innovation of new techniques. Notable among these
are on-shell techniques, in
which the basic building blocks are complete amplitudes, rather than
fundamental interactions. The on-shell framework has surpassed traditional
Feynman diagram expansions, both in delivering new results and in expressing
them in formulas that are not only compact, but also deeply illuminating. My
research develops the on-shell framework to incorporate all theories and
configurations of physical interest, building upon recent developments in pure
mathematics.
ERC
Synergy Grant Project: Mathematics of Scattering Amplitudes [MaScAmp]
The European Research Council has awarded funding to
advance the frontiers of number theory, algebraic geometry and string theory,
with applications to Feynman integrals and the aim of developing a new
framework for fundamental interactions in physics.
Openings for postdocs and PhD students will be posted on inspirehep.net/jobs when available.
Publications
Full
list of publications on INSPIRE
Lecture notes: Constructing
scattering amplitudes
Review
articles:
· Cutting-edge tools for cutting edges,
with C. Duhr, H. S. Hannesdottir and S. Mizera.
· Mathematical structures in
Feynman integrals, with S. Abreu and C. Duhr. (Chapter 3 of The SAGEX Review on Scattering
Amplitudes)
· Loop
amplitudes in gauge theories: modern analytic approaches